Lewd Family: Stepmother's Bedroom

いんらん家族　義母の寝室

Also known as いんらん家族 義母の寝室, Inran kazoku: Gibo no shinshitsu, 受験ママ 禁断の関係, 寝室覗き 義母のあえぎ, Juken mama: Kindan no kankei

Wataru, a young, nerdy man who also narrates the film's story, uses some of his time to peep on his parents having sex, as well as on his sister, and is often seen masturbating to a porn magazine.